FOCAS: The Faint Object Camera and Spectrograph for the Subaru Telescope
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Open Access
- 25 December 2002
- journal article
- research article
- Published by Oxford University Press (OUP) in Publications of the Astronomical Society of Japan
- Vol. 54 (6) , 819-832
- https://doi.org/10.1093/pasj/54.6.819
Abstract
The Faint Object Camera and Spectrograph (FOCAS) is a Cassegrain optical instrument for the Subaru Telescope. Its capabilities include $6^\prime \phi$ FOV direct imaging, low-resolution spectroscopy ($R=250 \hbox{--} 2000$ with ${0\rlap {.}{}^{\mathrm {\prime \prime }}4}$ slitwidth), multi-slit spectroscopy and polarimetry. We describe the overall design of FOCAS, its observing functions, and the performance verification procedures that have been carried out.
Keywords
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